OAA computing section circular NK 1574 P/2007 V2 (Hill)

The following improved orbital elements, by S. Nakano, are from 64 observations 2007 Oct. 14 to 2008 Feb. 10. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.56 arc second. See an orbit on YC 2573. Epoch = 2007 Aug. 8.0 TT T = 2007 July 30.89565 +/- 0.05995 (m.e.) TT Peri. = 278.52353 +/- 0.01621 Node = 99.86640 +/- 0.00353 (2000.0) Inc. = 2.47082 +/- 0.00011 q = 2.7749938 +/- 0.0001017 AU e = 0.3177379 +/- 0.0000339 a = 4.0673427 +/- 0.0000617 AU n' = 0.12015392 +/- 0.00000274 P = 8.203 +/- 0.0001867 years (+/- 0.07 day) The predicted orbit for the 2015 return is as follows: T = 2015 Oct. 23.07297 TT Epoch = 2015 Oct. 25.0 TT Peri. = 278.85669 e = 0.3173362 Node = 99.81862 (2000.0) a = 4.0719090 AU Inc. = 2.47033 n'= 0.11995186 q = 2.7797449 AU P = 8.217 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2007/ 071110 673 1.8+ 0.2+ 071114 704 0.8- 0.4+ 071014 691 0.7+ 0.2- 071110 G96 0.7- 0.3+ 071114 704 0.2- 0.6+ 071014 691 0.2+ 0.2- 071110 G96 0.1- 0.3+ 071114 704 1.5- 0.1- 071014 691 0.8- 0.3+ 071110 673 0.5- 0.3+ 071116 850 0.1+ 0.6- 071109 G96 0.6+ 0.3- 071110 G96 0.5+ 0.3+ 071116 850 0.1- 0.6- 071109 G96 0.0 0.2+ 071110 G96 0.6- 0.2+ 071116 204 0.6+ 0.2+ 071109 G96 0.5+ 0.1+ 071110 673 0.9+ 0.8+ 071117 204 0.8- 0.5+ 071109 G96 0.4+ 0.1- 071110 711 0.1- 0.4+ 071118 213 0.2- 0.1- 071109 G96 0.1- 0.2- 071110 711 0.9+ 0.1+ 071118 213 0.2- 0.0 071109 G96 0.1+ 0.1- 071110 711 0.2+ 0.1- 071118 213 0.1+ 0.5+ 071109 G96 0.0 0.2- 071110 474 0.0 0.0 071128 215 0.2+ 0.0 071109 G96 0.6+ 0.3- 071110 474 0.0 0.1- 071205 561 0.5+ 0.1- 071109 G96 0.7+ 0.4- 071110 474 0.7+ 0.3- 071205 561 0.2- 0.0 071109 235 0.7- 0.6- 071110 213 0.5- 0.2+ 071205 561 (0.1+ 2.5+) 071109 235 0.8+ 0.1- 071110 213 0.8- 0.5+ 071208 J47 0.4+ 0.4+ 071109 473 0.3- 1.9- 071110 213 0.5- 0.5+ 071208 J47 0.4+ 0.1+ 071109 473 (0.4- 2.8-) 071110 J47 (1.6- 2.5+) 071208 J47 0.1+ 0.2- 071109 147 (2.8- 1.6-) 071110 J47 (2.1- 2.5+) 071230 204 0.9- 0.2+ 071110 147 1.8- 1.5- 071111 J47 0.8- 0.7+ 2008/ 071110 147 1.4- 1.4- 071111 J47 0.8- 0.8+ 080210 G96 0.3+ 0.1+ 071110 H55 0.4+ 0.1+ 071111 349 0.2+ 0.2- 080210 G96 0.1+ 0.3- 071110 H55 0.3+ 0.2+ 071111 349 0.7+ 0.0 080210 G96 0.0 0.4- 071110 H55 0.3+ 0.1+ 071111 349 0.7+ 0.0 080210 G96 0.1- 0.0 071110 673 0.1- 0.1+ 071114 704 0.7+ 0.7+ ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2008 Feb. 14

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